To even start a team your going to need the basics: A field, minimum 8 players, numbered shirts, an umpire, and a device that can record video.
To have your team join the league you must fill out the league's team application, sent it to the league, and pay the filing fee.
Contact Info: (Phone Number, Email, Mailing Address)
Social Media: (Twitter, Facebook, YouTube, Website, etc.)
If you are just starting out you will be in the Association Division. It is the job of all teams in the division the schedule games with teams in there region.
Now that all the work and setup is out of the way all you'll need to do is go out on the field and start playing games